science Flashcards
ability to bond with itself;millions of carbon compounds
Organic Compunds
unit of measure;established in counting atoms
Mole
extremely large number;very small particles
Atoms
group of atoms
Molecule
compund made of molecules
molecular compound
shows how many atoms of each element
molecular formula
electrons around an atom remain in a region outside the nucleus
electron cloud
made up of a number of different
energy levels
electrons in the outer most levels
valence electrons
Who introduced the Lewis dot symbol
Gilbert Lewis
Who introduced the Lewis dot symbol
Gilbert Lewis
When did he introduce lewis dot symbol?
1916
symbol of element surrounded by dots
lewis dot symbol
formed when 2 atoms share 2 electron pairs
double bond
each atom contributes 3 electrons
triple bond
chemical bond;can be formed by the transfer of one or more electrons
ionic bond
elements with high electron affinities
salt
bond that holds atom together
chemical bond
electron are shared unequally
polar covalent bond
most compounds are crystalline solid at room temperature
ionic solids
ionic solid are held in place by ionic bonds
crystal structure
endlessly repeating lattice of ions
giant ionic structure
shows the number of atoms of each element
chemical formula
loses an electron
cation
receives an electron
anion
found on the right side of the periodic table
electron affinities
formed between a cation and an anion
ionic compound
share one or more pairs of electrons
covalent bond
single pair of electrons between bonded atoms produce a
single covalent bond
electrons that are shared between atoms are called
bonding electrons or bonding pairs
valence electron pairs that are not involved in bonding are
ione pairs or ione electron pairs
